Surgical device guidance and monitoring devices, systems, and methods

A device comprising:

• a) an attachment component comprising at least one location emitter, wherein the attachment component is configured to be attached to a hand-held medical device with a device tip;
• b) a display component:
• i) attached to, or ii) integral with, the attachment component, wherein the display component comprises a display screen;
• and
• c) a processor configured to receive information from a plurality of witness stations and generate position data of a tag and the hand-held medical device,
• wherein said display screen is configured to display the position data, and
• wherein said tag comprises an antenna and is physically separate from, and not physically linked to, any of:
• said attachment component, said display component, and said hand-held medical device;
• and
• wherein the position data displayed by the display screen includes:
• i) a tag indicator which corresponds to the physical location of said tag, and
• ii) at least one of the following additional indictors:
• A) a total distance indicator which indicates the distance of the device tip to the tag,
• B) a medical device indicator which corresponds to the location of the medical device with respect to the tag,
• C) a tag-tip vector indicator which provides a representation of the two-dimensional distance, and two-dimensional location, of the device tip to the tag;
• and
• D) a depth indicator which provides an indication of how high above, or below, the device tip is with respect to the tag.